That 'Manchester' term for bedlinen puzzled me when I first arrived in Godzone, too, along with many terms they/we share with Oz.
Another puzzler was the sign 'Choice' on fruit and vegetables. To a Pom it means option or select, but many of the fruiterers were Chinese, and it had come to mean 'good quality.'

Godzown =Gods Own Country = NZ.
Oz = Australia or Australian.
Manchester = Manchester Ware, I think. Most Commonwealth cotton goods were made there.